Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Kinzoku Kabushiki Kaisha

Bridgestone Corporation

Mitsubishi Materials Corporation

Shoichi Tanaka

Hiroshi Fujioka

Kenta Imai

Masahira Akasu

Yukio Fukushima

Kazuhito Nakamura

Hiroyuki Katsuno

Shinichi Hasegawa

Eiji Takano

Youichi Tezuka

Yoshiharu Tanaka

Yasuo Kuroda

Shoji Ishiwata

Toshiyuki Kai

Makoto Wakaki

Tsuneo Watanabe

Eiichiro Nakai

Akihiko Osako

Hiroshi Kojima

Tire tread

A distance measuring device having an improved control performance in a compact body by simplifying a structure for scanning a laser beam and a method of controlling the scanning. The device has a mirror for scanning an emitted laser beam, an axis around which the mirror is swung, a permanent magnet which swings along with the mirror, a core disposed opposite to the permanent magnet, a coil provided in the periphery of the core, a Hall element for detecting a swing angle of the mirror, and a circuit for controlling swing motion with a signal derived from a swing waveform formed in a predetermined shape in order to control a current in the coil, and a control signal formed by a controlled variable calculated from a deviation between a predetermined position of the mirror and a detected position.

Distance measuring device

Disclosed herein is a distance measuring apparatus comprising an irradiation unit for generating an electromagnetic wave, a receiving unit for receiving a reflected wave of the electromagnetic wave reflected by an object of measurement and generating a reception signal, and a propagation delay time measuring unit for measuring a propagation delay time by counting the number of pulses of a pulse train having a predetermined frequency. The propagation delay time is the time between the time that the irradiation unit irradiates the electromagnetic wave and the time that the reflected wave is received by the receiving unit. The vehicle distance measuring apparatus further comprises an electric discharge unit for performing an electric discharge from the time that the reflected wave is received by the receiving unit, a discharge-voltage measuring unit for measuring a discharge voltage of the discharge unit, and a distance computing unit for correcting the counted number of pulses, based on the propagation delay time and the measured discharge voltage, and computing a distance to the object.

Distance measuring apparatus

A tank 1 having a valve 6 in a head portion 4 and protected by a substantially cylindrical head skirt portion 7 is accommodated in a protective container 2. A load receiving member 23 having a projection 23c, to which a free end 7a of the head skirt portion 7 is fixed, is disposed between the head skirt portion 7 and the head support member 11. The head support member 11 is formed into a triple-layer structure formed by stacking, when viewed from the tank, a first layer having strong deformation resistance, and second and third layers 15 and 16 having weak deformation resistance. The second layer 15 includes an annular outer layer 15a having deformation resistance weaker than that of the first layer and an inner layer 15b fitted in the central space and having much weaker deformation resistance. The third layer 16 is made of the same material as that of the outer layer of the second layer. A rotation-stopper 20 is provided for the head skirt portion 7 so as to be attached to the protective container 2. The tank, with the above-described structural arrangements, has improved impact resistance in case of a fall or the like, while having an overall shortened length and reduced size.

Tank protective container

A distance measuring apparatus for a vehicle including: an irradiating means for emitting and irradiating an electromagnetic wave; a receiving means for receiving a reflected wave produced when the electromagnetic wave is reflected by an obstacle and generating a receiving signal; a propagation delay time period measuring means provided with a comparison value set such that a value for a comparison reference is larger in a case in which a propagation delay time period from irradiating to receiving the electromagnetic wave is shorter than in a case in which the propagation delay time period thereof is longer for comparing the receiving signal with the comparison value, recognizing a time point at which the receiving signal is equal to or larger than the comparison value when the receiving signal is compared with the comparison value as a receive detecting time point and measuring the propagation delay time period from a time point at which the irradiating means irradiates the electromagnetic wave to the receive detecting time point; and a distance calculating means for calculating a distance between the obstacle and a driving vehicle based on the propagation delay time period.

Distance measuring apparatus and distance measuring method for a vehicle

A distance measuring equipment which can detect a beam sending direction with a compact and simple structure is provided. The distance measuring equipment is equipped with a scanning means which swings a reflection means in a predetermined range to scan a beam, an original point detecting means which detects the original point as a reference position of the reflecting means, and a beam sending direction operating means which calculates a direction of the sending beam reflected by the reflecting means based on a detected output from the original point detecting means.

Distance measuring equipment for detecting a scanning direction

In a distance measuring apparatus, a large number of distance data within a certain calculation angle region are acquired so as to obtain distance data with high reliability. The distance measuring apparatus is comprised of: a transmitter/receiver device including at least one of a transmitter for projecting electromagnetic waves while scanning the electromagnetic waves, and a receiver for receiving reflection waves of the electromagnetic waves reflected from an object while scanning the reflection waves; an angle detecting apparatus for detecting at least one of an angle when the electromagnetic waves are projected and an angle when the reflection waves are received; a distance calculating apparatus for calculating a distance up to the object corresponding to the angle based upon a relationship between the electromagnetic waves and the reflection waves, and for using a calculation result as detection data; and a data processing apparatus for acquiring distance data in a calculation angle region corresponding to a plurality of the distance calculations based upon the detection data obtained during a plurality of distance calculations.

Distance measuring apparatus capable of measuring plural distance data

A vehicle following apparatus with a distance measuring function is provided in which once the driver roughly sets a vehicle following window on a display screen, the exact position and size of the window can be automatically adjusted so as to locate the image of a target preceding vehicle as sensed in the center of the window, and in which the distance to the target preceding vehicle can be successively measured in an exact manner while following the target vehicle. A pair of image sensors sense an object from two different points to form a pair of first and second images thereof. A window forming means defines a vehicle-following window of a variable size within the first images. A memory successively stores an image in the vehicle-following window. An image processor finds, from the first images at a current time, a new image which is the most similar to the image stored in the memory at a previous time. The image processor defines a provisional window containing therein the thus found new image. A controller not only calculates the distance to the preceding vehicle, but also adjusts the location of the provisional window to form a new window so that the new window thus formed contains the most number of horizontal lines. To this end, using the provisional window, differences between vertically adjacent image signals within the provisional window are summed up over the horizontal length of the provisional window to extract horizontal lines in the provisional window, so that the new window is defined based on a vertical position maximimizing the sum of the differences.

Vehicle following apparatus with a distance measuring function

A process for treating a radioactive liquid waste is disclosed, in which a radioactive liquid waste containing uranium and .beta.-decay nuclides, daughter nuclides of uranium, is treated by combination of a flocculation method using water glass as pretreatment and a subsequent ion exchange method. An approximately total amount of the uranium and a part of the .beta.-decay nuclides, daughter nuclides of uranium, in the liquid waste are captured by an amorphous silica precipitate formed by addition of the water glass and a remaining part of the .beta.-decay nuclides, daughter nuclides of uranium, is captured thereafter by the ion exchange treatment. The thus captured radioactive materials are respectively eluted from the filtered out precipitate, a radioactive solid waste, and the ion exchanger by acid treatment to be recovered as an acidic solution. Thus, the radioactive materials in the liquid waste are recovered approximately completely, thereby making the radioactivities of a final drain remarkably reduced. The precipitate is then dissolved in an alkali metal hydroxide solution to make the amorphous silica constituting the precipitate regenerated to water glass.

Process for treating a radioactive liquid waste

A process for recovering uranium and/or thorium from a liquid containing uranium and/or thorium is disclosed, which comprises capturing the uranium and/or thorium in the liquid by an amorphous silica precipitate formed by adding water glass to the liquid, making the captured uranium and/or thorium eluted from the precipitate by acid-treatment, recovering the eluted uranium and/or thorium as an acidic solution, and regenerating the precipitate to water glass by use of an alkali metal hydroxide solution. Thus, the uranium and/or thorium can be recovered in high yield and the amorphous silica precipitate, that is, a formed radioactive solid waste can be remarkably reduced.

Process for recovering uranium and/or thorium from a liquid containing

A process for recovering uranium and/or thorium from a liquid containing uranium and/or thorium is disclosed, which comprises making a precipitate composed mainly of amorphous silica formed by adding water glass to the liquid containing uranium and/or thorium, capturing the uranium and/or thorium in the liquid by the precipitate, treating the precipitate with acid to elute the captured uranium and/or thorium, adding ammonia or hydrogen peroxide to an acidic solution containing the eluted uranium and/or thorium to form a precipitate composed of ammonium salt or peroxide of the uranium and/or thorium, and filtering out the ammonium salt or peroxide precipitate. Thus, high purity solid uranium and/or thorium reutilizable for manufacture of nuclear fuel material can be recovered in high yield.

Growing community of inventors

Tokyo, Japan

Shoichi Tanaka